Answer:
the answer is the third one. with 13 as the leading coefficient 
Step-by-step explanation:
 
        
             
        
        
        
6x + 3y = -9
3y = -6x - 9
y = -2x - 4.5
slope (m1) of this line is -2
slope of the perpendicular line,
m2 = - (1/m1)
m2 = - (1 / -2)
m2 = 1/2
        
                    
             
        
        
        
No, because he only surveyed his class which 65% of them prefer planting corn over tomatoes. In which it does not mean that the school's third grade population that prefers planting corn over tomatoes is 65%
        
                    
             
        
        
        
Answer:
 a=0
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